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Upon the fort's completion in early October, 1791, St. Clair left a small group of soldiers and two cannons to garrison it. He proceeded northward forty-five miles, where he constructed Fort Jefferson. In early November, St. Clair's men marched northward. On November 4, 1791, Native Americans won a major victory against the American army in a battle that came to be known as St. Clair's Defeat. Fort Hamilton continued to serve as an important garrison as white Americans and Native Americans struggled for control of western Ohio. Modern-day Hamilton, Ohio, is located on the site of Fort Hamilton.